Quick answers
- Is CVE-2026-72584 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-72584 being exploited in the wild.
- How severe is CVE-2026-72584?
- High severity, with a CVSS score of 7.4, published 10 August 2026.
- Which products and versions are affected?
- Fastschema through v0.15.1.
- Is there a fix for CVE-2026-72584?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-72584 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-72584?
- Check whether you run Fastschema at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A time-of-check/time-of-use (TOCTOU) race condition exists in the account recovery OTP validation logic in FastSchema through v0.15.1. The vulnerability allows an unauthenticated remote attacker to bypass rate-limiting or attempt-count restrictions on OTP verification by exploiting a window between when the system checks the attempt limit and when it increments the counter. An attacker can rapidly submit multiple OTP guesses from different requests to brute-force 6-digit codes (1 million possibilities) before the limit is enforced. No authentication is required; the attack is triggered over the network during account recovery. A patch is expected in later versions beyond v0.15.1.
Affected products
- FastSchema FastSchema through v0.15.1
Timeline
- 2026-08-10: disclosed